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LM3691TLX-1.3 PDF预览

LM3691TLX-1.3

更新时间: 2024-11-15 03:51:47
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器稳压器开关式稳压器或控制器电源电路开关式控制器便携式
页数 文件大小 规格书
18页 2202K
描述
High Accuracy, Miniature 1A, Step-Down DC-DC Converter for Portable Applications

LM3691TLX-1.3 技术参数

生命周期:Transferred包装说明:VFBGA,
Reach Compliance Code:unknownECCN代码:EAR99
HTS代码:8542.39.00.01风险等级:5.56
Is Samacsys:N模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:VOLTAGE-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:5.5 V最小输入电压:2.3 V
标称输入电压:3.6 VJESD-30 代码:R-PBGA-B6
长度:1.565 mm功能数量:1
端子数量:6最高工作温度:85 °C
最低工作温度:-30 °C最大输出电流:1.7 A
标称输出电压:1.3 V封装主体材料:PLASTIC/EPOXY
封装代码:VFBGA封装形状:RECTANGULAR
封装形式:GRID ARRAY, VERY THIN PROFILE, FINE PITCH认证状态:Not Qualified
座面最大高度:0.675 mm表面贴装:YES
切换器配置:BUCK最大切换频率:4400 kHz
温度等级:OTHER端子形式:BALL
端子节距:0.5 mm端子位置:BOTTOM
宽度:1.26 mmBase Number Matches:1

LM3691TLX-1.3 数据手册

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June 11, 2008  
LM3691  
High Accuracy, Miniature 1A, Step-Down DC-DC Converter  
for Portable Applications  
General Description  
The LM3691 step-down DC-DC converter is optimized for  
powering ultra-low voltage circuits from a single Li-Ion cell or  
3 cell NiMH/NiCd batteries. It provides up to 1A load current,  
over an input voltage range from 2.3V to 5.5V. There are sev-  
eral different fixed voltage output options available.  
Features  
VOUT = 0.75V to 1.8V  
±1% DC output voltage precision  
2.3 VIN 5.5V  
4 MHz switching frequency  
64 μA (typ.) quiescent current in ECO mode  
1A maximum load capability  
LM3691 has a mode-control pin that allows the user to select  
Forced PWM mode or ECO mode that changes modes be-  
tween gated PWM mode and PWM automatically depending  
on the load. In ECO, LM3691 offers superior efficiency and  
very low Iq under light load conditions. ECO mode extends the  
battery life through reduction of the quiescent current during  
light load conditions and system standby.  
Automatic ECO/PWM mode switching  
Mode Pin to select ECO/Forced PWM mode  
1 μH inductor, 4.7 μF input capacitor (0603(1608) case  
size) and 4.7 μF output capacitor (0603(1608) case size)  
Current overload and thermal shutdown protections  
The LM3691 is available in a 6–bump micro SMD package.  
Only three external surface-mount components, a 1μH induc-  
tor, a 4.7 μF input capacitor and a 4.7μF output capacitor, are  
required.  
Only three tiny surface-mount external components  
required (solution size less than 15 mm2)  
Applications  
Mobile Phones  
Hand-Held Radios  
MP3 players  
Portable Hard Disk Drives  
Efficiency vs. Output Current  
(VOUT = 1.8V, ECO Mode)  
Typical Application Circuit  
30013430  
FIGURE 1. Typical Application Circuit  
30013454  
© 2008 National Semiconductor Corporation  
300134  
www.national.com  

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